The thermochemistry of 1,3-dimethylurea and 1,3-dimethylurea nitrate
✍ Scribed by R.H. Davies; A. Finch; J.O. Hill
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 500 KB
- Volume
- 184
- Category
- Article
- ISSN
- 0040-6031
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A route for 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) immobilization on silica gel was established after reacting at the first stage the precursor silylant agent 3-trimethoxysilylpropylamine to the support. The pesticide was covalently bonded to available amine groups of the precursor, giving
## Abstract The ^1^H n.m.r. spectra of doubly ^15^N labelled urea and 1,3‐dimethylurea have been analysed with the aid of computer simulation. ^1^H^1^H, ^1^H^15^N, ^15^N^15^N and ^13^C^15^N (from ^13^C Ft spectra) couplings are reported.
The adsorption of 3-(3,4-dichlorophenyl)-lI 1 dimethylurea (diuron) on bentonite desiccated at 110°C untreated, and acid treated with H,SO, solutions over a concentration range between 0.25 M and 5.00 M, from aqueous solution at 30°C has been studied. In addition, adsorption of diuron on combined ac